Which harmonies are appropriate for the marked measure?

ANSWER

The bass repeatedly plays Eb and Db while the upper voice makes a stepwise downward movement. The first harmony a dominant 9th chord, consisting of Eb, G, Bb, Db and F. The second harmony is a dominant 7th chord as it doesn't have F note. Correct answers are 4 and 1.
Which harmonies are appropriate for the marked measure?
ANSWER
The bass repeatedly plays Eb and Db while the upper voice makes a stepwise downward movement. The first harmony a dominant 9th chord, consisting of Eb, G, Bb, Db and F. The second harmony is a dominant 7th chord as it doesn't have F note. Correct answers are 4 and 1.